Combined compasses, square, etc.



' May 1, 1923. 1,453,625

R. H. JOHNSON COMBINED COMPASSE S, SQUARE, ETC

Filed Nov 24, 1920 Patente May 1, 192.

ROBERT E. JOHNSON, OF EDS GEES, CALIFQ i i i comamnn comrsns, saunas, 0.

Application filed. November 24, 19%. Serial Ho. $28,154.

To all whom it concern:

Be it known that I, ROBERT H. JOHNSON, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles number of different purposes, such as a bevel,

a square, a compass, means-for finding the center of circles, and for making circular framing, and for making polygonal figures of various numbers of sides without the necessity of making working drawings, or charts.

A further object of the invention is to provide a tool of the above character, the

' parts of which are so arranged as to permit the use of one part without interfering with the other parts, the parts also combining to form unitary tools for different purposes.

A still further object of the invention is to provide an improved combination tool for wood workers of the above character,' which will bejdurable and efiicient in use,'on'e that will'be simple and easy to manufacture; and one which can be placed upon the market at a reasonable cost.

With these and other objects in view, the invention consists in the novel construction, arrangement and formation of parts, as will be hereinafter more specifically described, claimed and illustrated in the accompanying drawings, forming a part of this specification, in which:

Figure 1 is a detail elevation of the imroved tool showing the same used for findmgjhe center of a circle.

igure 2 is a similar view of the improved tool showing the same in use, for marking timber for an octagon frame.

Figure 3 is an edge elevation of the improved tool, showing parts thereof in section. Fi re 4 is a detail transverse section through the stock of the improved tool, taken-on the line 4-4 of Fi re 1, and

Figure 5 is a detail elevatlon of the stop carried b one of the blades of the tool.

Referring to the drawings in detail, wherein similar reference characters designate rimary object of the invention is to.

corresponding parts throughout the several views, the letter A indicates the butt; B, the square; and C the stop carried by one of the blades of the square.

The butt A includes a pair of spaced sections 11 and 12, which are mounted in superposed relation and connected b bolts 13 and 14. Spacing was are 15 are mounted upon the bolts 13 and 14 so as to normally hold the sections 11 and 12 in their spaced position. The bolt 14 has a winged or thumb nut 16 threaded thereon for bringing the sections 11 and 12 toward each other for a purpose which will be hereinafter more fully described. The bolt 14 is arranged relatively near the forward terminal of the butt A and the inner surface of the sections '11 and 12 adjacent the bolt 14 are provided with registering substantiall semi-cylindrical channels 17, which are a apted to form a socket for the reception of a pencil or other marking instrument 18. It can .be seen that by adjusting the thumb nut 16, the members 11 and 12 will act in the-nature of clamps for firmly holding the marking instrument 18 in position against accidental displacement. Thus, the instrument is-permitted to be moved inwardlyor outwardl of the butt. This pencil is adapted .to be use for'scribing arcs, circles and the like. The opposite en I J ofythebutt' A from the marking instrument 18 is provided with a notch 20 and the parts of the butt lying on opposite sides of'the notch 20 are rounded asf fit 21-:'and'-'22 and are adapted to form points "for engaging the periphery of a circle, for a'p'urpose' which will hereinafter be more fully described.

The square B is preferably f d f Steel -9-5 or the like and inc udes a relatively narrow blade 23 and a relatively wide blade 24. As in the usual construction, the blades 23 and 24 are arranged at right angles. The blade 24- is provided with an opening for the re-.

ception of the pivot member 25. The bolt 25 is extended through the two sections of the butt A and is provided with a thumb nut 26 Which is adapted to hold the square B in any preferred adjusted position. When the blade 24 is arranged at right angles to means. of

the butt A, the straight outer edge of the blade 24 lies directly midway between the curved parts 21 and22 for a urposewhich will hereinafter be more fu ly described. The free end of the blade 23 is provided with a point 27 and this point is adapted to cooperate. with the pencil or markmg instru ment 18 to form a compass or means for scribing arcs and it can be seen that the blade 23 forms the axis of the compass and the butt A the marking leg for the compass.

The blade 24 is provided with two sets of graduation, a set of graduations 28 and a set of graduations 29. The graduations 29 start at a point on the blade which registers with the edge of the butt A when the blade is at right angles thereto and these graduations are formed on the inner edge of the blade. The graduations 28 start inwardly of the graduations '29 and the starting point thereof coincides with the inner edge of the butt A when the blade 24 is moved at an angle of substantially 45 with respect to the butt. These graduations 28 are formed on the outer edge of the blade 24.

'One side of the butt A is provided with a plurality of diverging marks 30, which radiate from a point 31 which registers with the meeting point of the inner edges of the blades when the blade .24 is at right angles to the butt A. These lines 30 glve points at which the blade can be set for marking various polygonal figures, and these marks have openings 32 formed adjacent thereto for the reception of a movable stop 33 against which the blade 24 is adapted to rest. This holds the blades 23 and 24 against movement in one direction.

It can be seen that the thumb 'nut 26 can also be used when so desired for holding the blades against swinging movement on the butt A.

The stop C is of substantially resilient U- shaped construction, and includes a body 35 and a pair of legs 36 and 37. This stop is adapted to be slid up and down on the blade as a IT-square, the butt A forms the head thereof.

The device also can be used as a bevel and this is one of its main purposes, and is especially adapted for making the cuts for roof rafters.

The device is also in the nature of a double bevel and will give the angle for cutting both ends of a beam or rafter, riser or the like,

at one setting, "as the sum of the two angles messes 21 and 22 are placed on the periphery of the circle, the center of which is desired to be known and the blade 24 is placedv directly at right angles to the butt A. A line is then drawn ddwn the outer edge of the blade 24 after which the two curved parts 21 and 22 are moved to another point and a similar line drawn down the blade 24 and the point at which these lines intersect will be the center of the circle. The tool can also be effectively used for making circular 'framings and the like. 1

' When it is desired to mark timber for an octagon frame, the blade 24 is moved to the From the foregoing description it can be seen that an improved tool has been provided, the uses of which are practically unlimited for wood workers, and these uses will readily suggest themselves to persons familiar in the art of wood working.

Changes in details may be made without departing from the spirit or scope of the in-. vention; but,

I claim:

1. A tool'com rising a butt, a blade pivoted to the butt, sai butt having a notch in one edge thereof, curved parts at each end of the notch arranged to lie at opposite sides of one edge of the blade when said blade is disposed at right angles to the butt.

2. A tool comprising a slotted butt, a square including a pair of blades pivotally connected to the butt, and disposed in the slotted portionthereof, the butt having a plurality of diverging lines formed thereon, and a stop adapted to be placed in registry with any one of said diverging lines for forming a rest for one of the blades of the square.

3. A tool comprising a butt, a blade pivotally secured to the butt, the butt having a notch therein defining a pair of spaced curved shoulders, one edge of the blade being adapted torest between said shoulders at equidistant spaced points therefrom, when iaid blade is dlsposed at right angles to the utt.

4. A tool comprising a butt, a square including a pair of right angularly extending blades pivoted at its angle to said butt, one of the blades having two sets of adua- 'tions formed thereon, one set starting in',

wardly of the other set, the starting point of the first mentioned set adapted to coincide with one edge of the butt when the said blade is disposed at an angle of substantially 45 with respect to the butt, the other set having its starting point adapted to co-incide with the mentioned edge of the butt when the said blade is disposed at right an Ies thereto, and a stop. slidably and dey tac ably carried by the graduated blade.

5. In a tool of the character described, a'

butt including a pair of spaced members, means for connecting the members together 10 and in spaced relationto each other, a blade disposed between the members and 'pivotallv connected thereto at one end, a point formed .on the other end of the blade, a marker slid- Y holding the marker against accidental movement.

ROBERT H. JOHNSON; 

